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74HCT4020DB Datasheet(PDF) 6 Page - NXP Semiconductors |
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74HCT4020DB Datasheet(HTML) 6 Page - NXP Semiconductors |
6 / 7 page September 1993 6 Philips Semiconductors Product specification 14-stage binary ripple counter 74HC/HCT4020 DC CHARACTERISTICS FOR 74HCT For the DC characteristics see “74HC/HCT/HCU/HCMOS Logic Family Specifications”. Output capability: standard ICC category: MSI Note to HCT types The value of additional quiescent supply current ( ∆ICC) for a unit load of 1 is given in the family specifications. To determine ∆ICC per input, multiply this value by the unit load coefficient shown in the table below. AC CHARACTERISTICS FOR 74HCT GND = 0 V; tr =tf = 6 ns; CL = 50 pF INPUT UNIT LOAD COEFFICIENT CP MR 0.85 1.10 SYMBOL PARAMETER Tamb (°C) UNIT TEST CONDITIONS 74HCT VCC (V) WAVEFORMS +25 −40 to +85 −40 to +125 min. typ. max. min. max. min. max. tPHL/ tPLH propagation delay CP to Q0 18 36 45 54 ns 4.5 Fig.7 tPHL/ tPLH propagation delay Qn to Qn+1 8 15 19 22 ns 4.5 Fig.7 tPHL propagation delay MR to Qn 22 45 56 68 ns 4.5 Fig.8 tTHL/ tTLH output transition time 7 15 19 22 ns 4.5 Fig.7 tW clock pulse width HIGH or LOW 20 7 25 30 ns 4.5 Fig.7 tW master reset pulse width HIGH 20 8 25 30 ns 4.5 Fig.8 trem removal time MR to CP 10 2 13 15 ns 4.5 Fig.8 fmax maximum clock pulse frequency 25 47 20 17 MHz 4.5 Fig.7 |
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